How to select the ideal Leak Testing Method for your Application


Every application and production process has its own demands and requirements when it comes to leak detection. In different industries, different standards are set in terms of quality control and maximum leak rates. Therefore, it is crucial to select the best leak detection method for every single application.

Within the last years, significant advances were made in the electronic leak testing technology, using either air or a tracer gas.

New techniques, improved sensitivity and faster test cycles – all of these technical evolutions have increased the quality and reliability of the different leak testing methods.

The pros and cons of these methods and their suitability for different leak detection applications as well as professional advice on selection criteria will be presented in the following.

Leak detection technologies – an overview

Before providing a guideline on how to select the right leak testing method for your application, the different technologies dealt with in this article will be presented in a general overview:

■ Air leak testing with Micro-Flow sensor at pressure conditions
This technology is based on an integrated micro sensor working with an accelerated flow. When air leaks from the unit or assembly under test, the emitted air is replenished via the Micro-Flow sensor to maintain a constant pressure (see Figure 1). The loss causes an electrical signal proportional to the volume, respectively to the mass flow. The Micro-Flow sensor thereby operates with a pressure reservoir, which is used to pressurize the unit under test (UUT) and has a sensitivity of 5·10-4 mbar l/s. Usually, only simple fixtures are necessary for this type of testing method.

Ideal Leak Testing Method Fig.1:Ideal leak testing method

Read more about this state of the art technology in the attached application report.

Should you have any further question, do not hesitate to contact us.

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